The Internet Power Line Adapter - University of Queensland

Home Automation, Power Lines and the Internet Quenten Alick
* TRANSMITTING DEVICE:
*
* retrieve house code and initialize NIC
*/
config.systemAddr.MSB = rbuffer.buf[1];
config.systemAddr.LSB = rbuffer.buf[0];
config.unitAddr.LSB = 0x01;
config.unitAddr.MSB = 0x00;
transmitter = TRUE; /* set transmitter device
status */
testRunning = FALSE;
DisableInterrupts();
rbuffer.state = REC_IDLE; /* reset serial state to
idle */
EnableInterrupts();
InitializeLL();
/*
* transmit "setup" packet to remote device if transmit
buffer available
*/
if(TxBfrAvailable) {
txLPDU.LPDUheader = UNACK |
STD_PRIORITY | BASIC_SERVICE;
txLPDU.DA.LSB = 0x00;
txLPDU.DA.MSB = 0x00;
txLPDU.DHC.LSB = 0x00;
txLPDU.DHC.MSB = 0x00;
txLPDU.SA.LSB = config.unitAddr.LSB;
txLPDU.SA.MSB = config.unitAddr.MSB;
txLPDU.SHC.LSB = config.systemAddr.LSB;
txLPDU.SHC.MSB = config.systemAddr.MSB;
txLPDU.LSDU[0] = SETUP_PKT;
*(uint16 *)&txLPDU.LSDU[1] = config.systemAddr;
txLPDU.LPDUlength = CEBUS_HEADER_LEN + 3;
transmitCompleted = FALSE;
TransmitPacket(0); /* use PT command w/o delay */
/*
* respond to host with NIC type
*/
if(!tbufferInUse) {
tbuffer.functionID = NIC_ID_CMD;
tbuffer.buf = &type;
ResponseToHost(sizeof(uint8));
}
transmitting = FALSE; /* wait for "start"
command */
}
}
void RecdSetupPkt( void )
{
/*
* REMOTE DEVICE:
*
* retrieve house code and initialize NIC
*/
config.systemAddr.MSB = rxLPDU.LSDU[2];
config.systemAddr.LSB = rxLPDU.LSDU[1];
config.unitAddr.LSB = 0x02;
config.unitAddr.MSB = 0x00;
transmitter = FALSE; /* set remote device
status*/
InitializeLL();
/*
* reset counters
*/
rxCount = 0;
rxValidCount = 0;
}
- 56 -
void XmitOriginal( void )
{
uint8 i; /* local counter */
static uint8 temp[2]; /* temporary storage */
/*
* TRANSMITTING DEVICE:
*
* load contents of transmit buffer (if available) with
running transmit
* count and fill rest of info field (up to host specified
length)
* with predictable data (for comparison purposes at
remote device)
*/
if (TxBfrAvailable) {
txLPDU.LPDUheader = txService |
STD_PRIORITY | BASIC_SERVICE;
txLPDU.DA.LSB = 0x02;
txLPDU.DA.MSB = 0x00;
txLPDU.DHC.LSB = config.systemAddr.LSB;
txLPDU.DHC.MSB = config.systemAddr.MSB;
txLPDU.SA.LSB = config.unitAddr.LSB;
txLPDU.SA.MSB = config.unitAddr.MSB;
txLPDU.SHC.LSB = config.systemAddr.LSB;
txLPDU.SHC.MSB = config.systemAddr.MSB;
txLPDU.LSDU[0] = TRANS_PKT;
txLPDU.LSDU[1] = HIGH_BYTE_OF(txCount);
txLPDU.LSDU[2] = LOW_BYTE_OF(txCount);
for(i=0;i